5. Glossary

Keplerian; keplerian

Relating to the motion obtained in the two-body problem.

Orbital parameters

Geometric parameters characterizing a Keplerian conic.

Osculateur; osculating

Relating to the instantaneous Keplerian orbit.

Reduction; reduction

Process of correcting measurements and switching to geocentric reference frame.

Filtering; filtering

Real-time estimation of the current state (osculating orbit).

Smoothing

Delayed-time estimation of the entire trajectory.